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Rev | Author | Line No. | Line |
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3763 | Serge | 1 | /* |
2 | * kobject.h - generic kernel object infrastructure. |
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3 | * |
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4 | * Copyright (c) 2002-2003 Patrick Mochel |
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5 | * Copyright (c) 2002-2003 Open Source Development Labs |
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6 | * Copyright (c) 2006-2008 Greg Kroah-Hartman |
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7 | * Copyright (c) 2006-2008 Novell Inc. |
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8 | * |
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9 | * This file is released under the GPLv2. |
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10 | * |
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11 | * Please read Documentation/kobject.txt before using the kobject |
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12 | * interface, ESPECIALLY the parts about reference counts and object |
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13 | * destructors. |
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14 | */ |
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15 | |||
16 | #ifndef _KOBJECT_H_ |
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17 | #define _KOBJECT_H_ |
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18 | |||
19 | #include |
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20 | #include |
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21 | //#include |
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22 | #include |
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23 | #include |
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24 | #include |
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25 | //#include |
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26 | #include |
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27 | #include |
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28 | //#include |
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29 | |||
30 | #define UEVENT_HELPER_PATH_LEN 256 |
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31 | #define UEVENT_NUM_ENVP 32 /* number of env pointers */ |
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32 | #define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */ |
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33 | |||
5056 | serge | 34 | #ifdef CONFIG_UEVENT_HELPER |
3763 | Serge | 35 | /* path to the userspace helper executed on an event */ |
36 | extern char uevent_helper[]; |
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5056 | serge | 37 | #endif |
3763 | Serge | 38 | |
39 | /* counter to tag the uevent, read only except for the kobject core */ |
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40 | extern u64 uevent_seqnum; |
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41 | |||
42 | /* |
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43 | * The actions here must match the index to the string array |
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44 | * in lib/kobject_uevent.c |
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45 | * |
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46 | * Do not add new actions here without checking with the driver-core |
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47 | * maintainers. Action strings are not meant to express subsystem |
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48 | * or device specific properties. In most cases you want to send a |
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49 | * kobject_uevent_env(kobj, KOBJ_CHANGE, env) with additional event |
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50 | * specific variables added to the event environment. |
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51 | */ |
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52 | enum kobject_action { |
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53 | KOBJ_ADD, |
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54 | KOBJ_REMOVE, |
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55 | KOBJ_CHANGE, |
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56 | KOBJ_MOVE, |
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57 | KOBJ_ONLINE, |
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58 | KOBJ_OFFLINE, |
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59 | KOBJ_MAX |
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60 | }; |
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61 | |||
62 | struct kobject { |
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63 | const char *name; |
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64 | struct list_head entry; |
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65 | struct kobject *parent; |
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66 | // struct kset *kset; |
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67 | struct kobj_type *ktype; |
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68 | // struct sysfs_dirent *sd; |
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69 | struct kref kref; |
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5056 | serge | 70 | #ifdef CONFIG_DEBUG_KOBJECT_RELEASE |
71 | struct delayed_work release; |
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72 | #endif |
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3763 | Serge | 73 | unsigned int state_initialized:1; |
74 | unsigned int state_in_sysfs:1; |
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75 | unsigned int state_add_uevent_sent:1; |
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76 | unsigned int state_remove_uevent_sent:1; |
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77 | unsigned int uevent_suppress:1; |
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78 | }; |
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79 | |||
80 | extern __printf(2, 3) |
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81 | int kobject_set_name(struct kobject *kobj, const char *name, ...); |
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82 | extern int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, |
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83 | va_list vargs); |
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84 | |||
85 | static inline const char *kobject_name(const struct kobject *kobj) |
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86 | { |
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87 | return kobj->name; |
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88 | } |
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89 | |||
90 | extern void kobject_init(struct kobject *kobj, struct kobj_type *ktype); |
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91 | extern __printf(3, 4) __must_check |
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92 | int kobject_add(struct kobject *kobj, struct kobject *parent, |
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93 | const char *fmt, ...); |
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94 | extern __printf(4, 5) __must_check |
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95 | int kobject_init_and_add(struct kobject *kobj, |
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96 | struct kobj_type *ktype, struct kobject *parent, |
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97 | const char *fmt, ...); |
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98 | |||
99 | extern void kobject_del(struct kobject *kobj); |
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100 | |||
101 | extern struct kobject * __must_check kobject_create(void); |
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102 | extern struct kobject * __must_check kobject_create_and_add(const char *name, |
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103 | struct kobject *parent); |
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104 | |||
105 | extern int __must_check kobject_rename(struct kobject *, const char *new_name); |
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106 | extern int __must_check kobject_move(struct kobject *, struct kobject *); |
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107 | |||
108 | extern struct kobject *kobject_get(struct kobject *kobj); |
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109 | extern void kobject_put(struct kobject *kobj); |
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110 | |||
5056 | serge | 111 | extern const void *kobject_namespace(struct kobject *kobj); |
3763 | Serge | 112 | extern char *kobject_get_path(struct kobject *kobj, gfp_t flag); |
113 | |||
114 | struct kobj_type { |
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115 | void (*release)(struct kobject *kobj); |
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116 | // const struct sysfs_ops *sysfs_ops; |
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117 | // struct attribute **default_attrs; |
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118 | // const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj); |
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119 | // const void *(*namespace)(struct kobject *kobj); |
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120 | }; |
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121 | |||
122 | struct kobj_uevent_env { |
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123 | char *envp[UEVENT_NUM_ENVP]; |
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124 | int envp_idx; |
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125 | char buf[UEVENT_BUFFER_SIZE]; |
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126 | int buflen; |
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127 | }; |
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128 | |||
129 | //struct kset_uevent_ops { |
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130 | // int (* const filter)(struct kset *kset, struct kobject *kobj); |
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131 | // const char *(* const name)(struct kset *kset, struct kobject *kobj); |
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132 | // int (* const uevent)(struct kset *kset, struct kobject *kobj, |
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133 | // struct kobj_uevent_env *env); |
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134 | //}; |
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135 | |||
136 | struct kobj_attribute { |
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137 | // struct attribute attr; |
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138 | ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr, |
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139 | char *buf); |
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140 | ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr, |
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141 | const char *buf, size_t count); |
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142 | }; |
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143 | |||
144 | extern const struct sysfs_ops kobj_sysfs_ops; |
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145 | |||
146 | struct sock; |
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147 | |||
148 | /** |
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149 | * struct kset - a set of kobjects of a specific type, belonging to a specific subsystem. |
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150 | * |
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151 | * A kset defines a group of kobjects. They can be individually |
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152 | * different "types" but overall these kobjects all want to be grouped |
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153 | * together and operated on in the same manner. ksets are used to |
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154 | * define the attribute callbacks and other common events that happen to |
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155 | * a kobject. |
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156 | * |
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157 | * @list: the list of all kobjects for this kset |
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158 | * @list_lock: a lock for iterating over the kobjects |
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159 | * @kobj: the embedded kobject for this kset (recursion, isn't it fun...) |
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160 | * @uevent_ops: the set of uevent operations for this kset. These are |
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161 | * called whenever a kobject has something happen to it so that the kset |
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162 | * can add new environment variables, or filter out the uevents if so |
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163 | * desired. |
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164 | */ |
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165 | struct kset { |
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166 | struct list_head list; |
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167 | spinlock_t list_lock; |
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168 | struct kobject kobj; |
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169 | // const struct kset_uevent_ops *uevent_ops; |
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170 | }; |
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171 | |||
172 | //extern void kset_init(struct kset *kset); |
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173 | //extern int __must_check kset_register(struct kset *kset); |
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174 | //extern void kset_unregister(struct kset *kset); |
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175 | //extern struct kset * __must_check kset_create_and_add(const char *name, |
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176 | // const struct kset_uevent_ops *u, |
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177 | // struct kobject *parent_kobj); |
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178 | |||
179 | //static inline struct kset *to_kset(struct kobject *kobj) |
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180 | //{ |
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181 | // return kobj ? container_of(kobj, struct kset, kobj) : NULL; |
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182 | //} |
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183 | |||
184 | //static inline struct kset *kset_get(struct kset *k) |
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185 | //{ |
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186 | // return k ? to_kset(kobject_get(&k->kobj)) : NULL; |
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187 | //} |
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188 | |||
189 | //static inline void kset_put(struct kset *k) |
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190 | //{ |
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191 | // kobject_put(&k->kobj); |
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192 | //} |
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193 | |||
194 | static inline struct kobj_type *get_ktype(struct kobject *kobj) |
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195 | { |
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196 | return kobj->ktype; |
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197 | } |
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198 | |||
199 | //extern struct kobject *kset_find_obj(struct kset *, const char *); |
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200 | |||
201 | /* The global /sys/kernel/ kobject for people to chain off of */ |
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202 | extern struct kobject *kernel_kobj; |
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203 | /* The global /sys/kernel/mm/ kobject for people to chain off of */ |
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204 | extern struct kobject *mm_kobj; |
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205 | /* The global /sys/hypervisor/ kobject for people to chain off of */ |
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206 | extern struct kobject *hypervisor_kobj; |
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207 | /* The global /sys/power/ kobject for people to chain off of */ |
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208 | extern struct kobject *power_kobj; |
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209 | /* The global /sys/firmware/ kobject for people to chain off of */ |
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210 | extern struct kobject *firmware_kobj; |
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211 | |||
212 | int kobject_uevent(struct kobject *kobj, enum kobject_action action); |
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213 | int kobject_uevent_env(struct kobject *kobj, enum kobject_action action, |
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214 | char *envp[]); |
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215 | |||
216 | __printf(2, 3) |
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217 | int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...); |
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218 | |||
219 | int kobject_action_type(const char *buf, size_t count, |
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220 | enum kobject_action *type); |
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221 | |||
222 | #endif /* _KOBJECT_H_ */ |